The statement that best describes the outcome of the Opium Wars is: The Qing Dynasty was forced to enter an unequal trading relationship that benefited Europeans.
The Opium Wars (1839-1842 and 1856-1860) resulted in the Treaty of Nanking and other agreements that imposed harsh terms on the Qing Dynasty, including ceding territory (such as Hong Kong) and granting extraterritorial rights to British citizens, effectively establishing an unequal trade relationship that favored European powers.